Blake Masters holds double digit-lead over AG Mark Brnovich in Arizona Senate primary

Blake Masters is leading Arizona's GOP primary for U.S. Senate by double digits against three other candidates, including Attorney General Mark Brnovich (R-Ariz.), according to a survey released Wednesday by Public Policy Polling.

Masters, who received former President Donald Trump's endorsement earlier this month, is polling at 29% with about one month left before the August 2 primary.

Masters support almost doubles that of his next nearest competitor, Brnovich, who has 15%.

Businessman Jim Lamon is at 10%, while retired Maj. Gen. Mick McGuire comes in last with 5%. 

Trump's endorsement may have boosted Masters up in the primary. In March, Masters came in 3rd with 13%, while Brnovich polled at 24% and Lamon at 22%. 

In his endorsement, Trump criticized Brnovich as "such a disappointment."

The former president has attacked Brnovich on several occasions for not acting on allegations of election fraud during Arizona's 2020 presidential election.

Trump said Masters would be strong on border security, a major issue in Arizona.

"Blake is Strong on Border Security, in particular, the disastrous Southern Border where people are pouring into the U.S. by the millions, and destroying our Country.  Just two years ago, with the help of the Wall, we had the Strongest Border in the history of our Country, and now we have the weakest—Blake will turn that around quickly," he said.